Jump to content
Ultimaker Community of 3D Printing Experts
Migo

syringe extruder for umo+

Recommended Posts

i need a simple design to make for my umo+ .i have seen a lot .but all are mounted to the original extruder .

my umo+ has e3d hot end not like the original one 

so i need a bowden  design to fit on it 

i need to know how does it work ?

are there any modification that has to be made ?

Share this post


Link to post
Share on other sites

It should be mentioned in the files there. Basically you have to reverse the feeding (you can do this in the gcode by replacing all E values by -E, reverse some wires on your stepper motor or mount it the other way around), so the filament will pull instead of push. The pulling motion will pull down the top of the syringe, like how you would squeeze the contents out of it if you would do it manually.

Something like retraction is not possible. 

Share this post


Link to post
Share on other sites

In biomedical sciences people often use peristaltic pumps to transport liquids and thin pastes (=with a consistency similar to sirup, honey, yoghurt). For example to inject dead bodies with formol or other preservatives. But this will not work for thick pastes like choco, butter, thick glue, thick silicone. It all depends on the materials you want to extrude, and on the way they are delivered to you. If in bulk or in plastic bags like blood and water in hospitals then it should work. If in standard industrial silicone or glue syringes it will be very difficult.

 

If you are willing to do a bit of development, I think such a peristaltic pump concept might work for 3D-printing too. Connect the feeder motor to the shaft of the peristaltic pump (maybe via a reduction gear for more power), adjust e-steps, and instead of a bowden tube, use a silicone tube with a nozzle. In an UMO or UM2 you might be able to use the build-in provisions for the never unused second feeder and nozzle? At least, if the electronics board can handle a second feeder motor (I don't know which UM-models do have driver chips for a second feeder)?

 

Google "peristaltic pumps" > images. Maybe you could get some inspiration from these areas?

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 95 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!